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Finding the Fourth Proportional to 4,921.70, 7,380.74 and 1,800.68

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Solution

The fourth proportional to 4,921.70, 7,380.74 and 1,800.68 is: 2,700.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921.70 : 7,380.74 = 1,800.68 : x
  2. Step 2: Convert to fraction form
    4,921.70/7,380.74 = 1,800.68/x
  3. Step 3: Cross multiply
    4,921.70x = 7,380.74 × 1,800.68
  4. Step 4: Simplify right side
    4,921.70x = 13,290,318.50
  5. Step 5: Solve for x
    x = 13,290,318.50/4,921.70
  6. Step 6: Final answer
    x = 2,700.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.